From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: Wolfram Sang <wsa@the-dreams.de>,
Jarkko Nikula <jarkko.nikula@linux.intel.com>,
James Hogan <jhogan@kernel.org>
Cc: Paul Burton <paul.burton@mips.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
linux-i2c@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mips@linux-mips.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Allan Nielsen <allan.nielsen@microsemi.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Rob Herring <robh+dt@kernel.org>
Subject: [PATCH v4 4/7] i2c: designware: document MSCC Ocelot bindings
Date: Thu, 16 Aug 2018 10:45:18 +0200 [thread overview]
Message-ID: <20180816084521.16289-5-alexandre.belloni@bootlin.com> (raw)
In-Reply-To: <20180816084521.16289-1-alexandre.belloni@bootlin.com>
Document bindings for the Microsemi Ocelot integration of the Designware
I2C controller.
Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
Documentation/devicetree/bindings/i2c/i2c-designware.txt | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
index fbb0a6d8b964..3e4bcc2fb6f7 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
@@ -3,6 +3,7 @@
Required properties :
- compatible : should be "snps,designware-i2c"
+ or "mscc,ocelot-i2c" with "snps,designware-i2c" for fallback
- reg : Offset and length of the register set for the device
- interrupts : <IRQ> where IRQ is the interrupt number.
@@ -11,8 +12,12 @@ Recommended properties :
- clock-frequency : desired I2C bus clock frequency in Hz.
Optional properties :
+ - reg : for "mscc,ocelot-i2c", a second register set to configure the SDA hold
+ time, named ICPU_CFG:TWI_DELAY in the datasheet.
+
- i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
- This option is only supported in hardware blocks version 1.11a or newer.
+ This option is only supported in hardware blocks version 1.11a or newer and
+ on Microsemi SoCs ("mscc,ocelot-i2c" compatible).
- i2c-scl-falling-time-ns : should contain the SCL falling time in nanoseconds.
This value which is by default 300ns is used to compute the tLOW period.
--
2.18.0
next prev parent reply other threads:[~2018-08-16 8:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 8:45 [PATCH v4 0/7] Add support for MSCC Ocelot i2c Alexandre Belloni
2018-08-16 8:45 ` [PATCH v4 1/7] i2c: designware: use generic table matching Alexandre Belloni
2018-08-16 8:45 ` [PATCH v4 2/7] i2c: designware: move #ifdef CONFIG_OF to the top Alexandre Belloni
2018-08-16 8:45 ` [PATCH v4 3/7] i2c: designware: allow IP specific sda_hold_time Alexandre Belloni
2018-08-16 8:45 ` Alexandre Belloni [this message]
2018-08-17 15:09 ` [PATCH v4 4/7] i2c: designware: document MSCC Ocelot bindings Rob Herring
2018-08-20 18:13 ` Rob Herring
2018-08-20 19:34 ` Alexandre Belloni
2018-08-16 8:45 ` [PATCH v4 5/7] i2c: designware: add MSCC Ocelot support Alexandre Belloni
2018-08-16 8:45 ` [PATCH v4 6/7] MIPS: dts: mscc: Add i2c on ocelot Alexandre Belloni
2018-08-16 8:45 ` [PATCH v4 7/7] MIPS: dts: mscc: enable i2c on ocelot_pcb123 Alexandre Belloni
2018-08-16 10:58 ` [PATCH v4 0/7] Add support for MSCC Ocelot i2c Jarkko Nikula
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